<?php
namespace common\models;

use Yii;
use yii\base\NotSupportedException;
use yii\behaviors\TimestampBehavior;
use yii\db\ActiveRecord;
use yii\web\IdentityInterface;
use yii\helpers\VarDumper;

/**
 * User model
 *
 * @property integer $id
 * @property string $username
 * @property string $password
 * @property string $password_repeat 
 * @property string $password_hash
 * @property string $password_reset_token
 * @property string $email
 * @property string $auth_key
 * @property integer $status
 * @property integer $created_at
 * @property integer $updated_at
 * @property string $password write-only password
 */
class User extends ActiveRecord implements IdentityInterface
{
    const STATUS_DELETED = 0;
    const STATUS_ACTIVE = 10;
    public $password;
    public $password_repeat;


    /**
     * @inheritdoc
     */
    public static function tableName()
    {
        return '{{%user}}';
    }

    /**
     * @inheritdoc
     */
    public function behaviors()
    {
        return [
            TimestampBehavior::className(),
        ];
    }

    /**
     * @inheritdoc
     */
    public function rules()
    {
    	return [
    			['username', 'trim'],
    			['username', 'required'],
    			['username', 'unique', 'targetClass' => '\common\models\User', 'message' => '用户名已经存在！'],
    			['username', 'string', 'min' => 2, 'max' => 255],
    			
    			['email', 'trim'],
    			['email', 'required'],
    			['email', 'email'],
    			['email', 'string', 'max' => 255],
    			['email', 'unique', 'targetClass' => '\common\models\User', 'message' => 'Email地址已经存在！'],
    			
    			['password', 'required'],
    			['password', 'string', 'min' => 6],
    			['password_repeat', 'compare', 'compareAttribute' => 'password', 'message' => '两次输入的密码不一致！'],
    			
    		[['username','email','password','password_repeat'], 'required'],
        ];
    }

    /**
     * @inheritdoc
     */
    public function attributeLabels()
    {
    	return [
    			'id' => 'ID',
    			'username' => '登录帐号',
    			'email' => '电子邮件',
    			'password'=>'密码',
    			'password_repeat'=>'重复密码',
    			'created_at' => '建立时间',
    	];
    }
    
    /**
     * @inheritdoc
     */
    public static function findIdentity($id)
    {
        return static::findOne(['id' => $id, 'status' => self::STATUS_ACTIVE]);
    }

    /**
     * @inheritdoc
     */
    public static function findIdentityByAccessToken($token, $type = null)
    {
        throw new NotSupportedException('"findIdentityByAccessToken" is not implemented.');
    }

    /**
     * Finds user by username
     *
     * @param string $username
     * @return static|null
     */
    public static function findByUsername($username)
    {
        return static::findOne(['username' => $username, 'status' => self::STATUS_ACTIVE]);
    }

    /**
     * Finds user by password reset token
     *
     * @param string $token password reset token
     * @return static|null
     */
    public static function findByPasswordResetToken($token)
    {
        if (!static::isPasswordResetTokenValid($token)) {
            return null;
        }

        return static::findOne([
            'password_reset_token' => $token,
            'status' => self::STATUS_ACTIVE,
        ]);
    }

    /**
     * Finds out if password reset token is valid
     *
     * @param string $token password reset token
     * @return bool
     */
    public static function isPasswordResetTokenValid($token)
    {
        if (empty($token)) {
            return false;
        }

        $timestamp = (int) substr($token, strrpos($token, '_') + 1);
        $expire = Yii::$app->params['user.passwordResetTokenExpire'];
        return $timestamp + $expire >= time();
    }

    /**
     * @inheritdoc
     */
    public function getId()
    {
        return $this->getPrimaryKey();
    }

    /**
     * @inheritdoc
     */
    public function getAuthKey()
    {
        return $this->auth_key;
    }

    /**
     * @inheritdoc
     */
    public function validateAuthKey($authKey)
    {
        return $this->getAuthKey() === $authKey;
    }

    /**
     * Validates password
     *
     * @param string $password password to validate
     * @return bool if password provided is valid for current user
     */
    public function validatePassword($password)
    {
        return Yii::$app->security->validatePassword($password, $this->password_hash);
    }

    /**
     * Generates password hash from password and sets it to the model
     *
     * @param string $password
     */
    public function setPassword($password)
    {
        $this->password_hash = Yii::$app->security->generatePasswordHash($password);
    }

    /**
     * Generates "remember me" authentication key
     */
    public function generateAuthKey()
    {
        $this->auth_key = Yii::$app->security->generateRandomString();
    }

    /**
     * Generates new password reset token
     */
    public function generatePasswordResetToken()
    {
        $this->password_reset_token = Yii::$app->security->generateRandomString() . '_' . time();
    }

    /**
     * Removes password reset token
     */
    public function removePasswordResetToken()
    {
        $this->password_reset_token = null;
    }
    
    /**
     * Signs user up.
     *
     * @return User|null the saved model or null if saving fails
     */
    public function signup()
    {
    	if (!$this->validate()) {
    		return null;
    	}
    	
    	$user = new User();
    	$nowtime = time() + 8 * 3600;
    	$user->username = $this->username;
    	$user->email = $this->email;
    	$user->created_at = $nowtime;
    	$user->updated_at = $nowtime;
    	$user->status = 10;
    	$user->setPassword($this->password);
    	$user->generateAuthKey();
    	return $user->save(false) ? $user : null;
    }
}

